U++ framework: U++ Library : Other (not classified elsewhere) » I request the implementation of callback5

Home » U++ Library support » U++ Library : Other (not classified elsewhere) » I request the implementation of callback5

Show: Today's Messages :: Polls :: Message Navigator
E-mail to friend

Re: I request the implementation of callback5 [message #49838 is a reply to message #49837]

Wed, 16 May 2018 09:10

Oblivion
Messages: 1273
Registered: August 2007

Senior Contributor

Quote:

it does not seem to be work..

Possibly a capture issue. I can't really say what's wrong until you provide the error messages. Smile

threads[free_index].Run ( [&,a,bot1,result_mode, stat_group_id]

Not a good practice,really. Try to avoid using default capture by reference where possible. As it captures every variable in scope (This can give you headaches when your code gets complex.).

And as I said before, If you are capturing by reference, you need to take into account the lifetime of the captured object to prevent dangling references.

Capture by reference explicitly only the variables you need. And use the capture by value mechanism for others:

threads[free_index].Run ( [=,&a,&bot1,&result_mode, &stat_group_id]

By the way, using lambda's value copying is that thread safe?

Capture by value, copies (or moves where possible or explicitly stated) the parameters for each instance.
In general it is no different than ordinary copy operations, so yes.

(There are some corner cases though. I suggest reading Scott Meyers' Effective Modern C++ for information on the possible but rare complications.)

And again I suggest using CoWork if possible, as you seem to be dealing with worker threads.
A dumb, and simple example:

int n = 0;

CoWork co;

     for(int i = 0; i < 6; i++)
       co & [=, &n]{
               // Thread Code.
               CoWork::FinLock();
               n++;
       };
     co.Finish(); // Waits until all workers have finished their jobs. (There is also a non-blocking version: CoWork::IsFinished())

Best regards,
Oblivion

Github page: https://github.com/ismail-yilmaz
Bobcat the terminal emulator: https://github.com/ismail-yilmaz/Bobcat
TerminalCtrl package https://github.com/ismail-yilmaz/Terminal

[Updated on: Wed, 16 May 2018 09:55]

Report message to a moderator

[Message index]

		I request the implementation of callback5 By: aftershock on Wed, 09 May 2018 21:23
		Re: I request the implementation of callback5 By: Oblivion on Wed, 09 May 2018 23:00
		Re: I request the implementation of callback5 By: aftershock on Thu, 10 May 2018 10:13
		Re: I request the implementation of callback5 By: Oblivion on Thu, 10 May 2018 10:33
		Re: I request the implementation of callback5 By: aftershock on Thu, 10 May 2018 18:53
		Re: I request the implementation of callback5 By: Oblivion on Thu, 10 May 2018 19:15
		Re: I request the implementation of callback5 By: aftershock on Tue, 15 May 2018 20:26
		Re: I request the implementation of callback5 By: Oblivion on Wed, 16 May 2018 09:10
		Re: I request the implementation of callback5 By: aftershock on Wed, 16 May 2018 12:03
		Re: I request the implementation of callback5 By: Oblivion on Wed, 16 May 2018 13:25
		Re: I request the implementation of callback5 By: aftershock on Wed, 16 May 2018 23:26
		Re: I request the implementation of callback5 By: mirek on Fri, 18 May 2018 14:50

Previous Topic:	design flaw in scatterctrl?
Next Topic:	How can I turn off soring in ArrayCtrl?

Goto Forum:

-=] Back to Top [=-

[ Syndicate this forum (XML) ] [

] [

]

Current Time: Sat Jul 25 05:46:38 GMT+2 2026

Total time taken to generate the page: 0.00728 seconds